Imágenes de páginas
PDF
EPUB

Genus Liosoma.-Tentacles 12, scutiform. Body cylindrical, short.

Genus Caudina.-Tentacles 12, digitately divided at the end. Body strongly contracted behind. Skin very rough, with numerous calcareous plates.

Genus Echinosoma.-Tentacles 12, stump-like. Body ascidianlike. Skin covered with large calcareous scales, which may carry a centre spine.

Genus Embolus.-Tentacles 15, stump-like. calcareous ring wanting.

Family II.-Dendrochirota.

Esophageal

Feet- and lung-bearing Holothurians, with a completely developed ambulacral system, and tree-like branching tentacles. Five muscles which spring from the circum-oesophageal plates, go through the whole cavity of the body.

Sub-family I.-Stichopoda.

The small feet of the ambulacra arranged in well-marked rows; the interambulacral areas almost always without any feet.

Genus Cucumaria.-In all the five ambulacra similarly formed feet stand in several rows; some species have them on the interambulacral areas. Body generally sub-pentagonal. Tentacles 10, frequently with two smaller ones, which conform to the middle radius of the trivium.

Genus Ocnus.-The ambulacra, at least upon the back, with only a single row of widely-separated feet. Tentacles 10, irregularly branched, the two middle central ones smaller than the others. Large calcareous plates in the skin.

Genus Colochirus.-The feet of the ventral surface in three clearly separated rows; upon the back only ambulacral papillæ. The two middle tentacles of the ventral side smaller than the remaining eight. Anus with or without calcareous teeth.

Genus Echinocucumis.-Feet in five rows. Ten dissimilar, branching tentacles. Skin covered with long spiny calcareous scales.

Sub-family Gastropoda.

Feet arranged in well-marked rows upon the clearly-defined ventral area. No feet on the back. Calcareous plates in the form of large scales.

Genus Psolus.-Characters of the sub-family.

Sub-family Sporadipoda.

Feet surrounding the whole body evenly, rarely or never showing an arrangement into rows.

Genus Thyone.-Tentacles 10, of which two on the ventral side are smaller. Feet more or less densely scattered over the whole body, but occasionally an indication of rows can be seen. Anus with or without calcareous teeth.

Genus Thyonidium.-Tentacles 20. Five large pairs alternating with five small ones. The small feet are sometimes quite

close, sometimes more scattered, and are then arranged in radiating rows.

Genus Orcula.-Tentacles 10 to 20, of which five simple ones are alternately smaller. Anus toothless. Feet distributed evenly over the whole body.

Genus Phyllophorus.-Tentacles 12 to 16, within which is a circle of 5 or 6 much smaller ones.

Genus Stereoderma.-Body covered with simple feet, which on the right or left side of the ventral area are in a double row. Anus toothless. Tentacles 10, the two middle on the ventral side smaller.

Genus Hemicrepis.-Back, and anterior and posterior portions of the ventral surface with warts, upon which are feet. Ventral area densely covered with feet. Tentacles 12.

Family Aspidochirota.

Feet- and lung-bearing Holothurians, with a well-developed ambulacral system, and scutiform tentacles. Retractor muscle of gullet wanting. Generally a single bundle of reproductive follicles on the left of the mesentery.

Genus Stichopus.-Tentacles 18 to 20. Body four-angled. Ambulacral papillæ standing upon warts, which are often arranged in longitudinal rows. Ventral surface flat, generally with three distinct longitudinal rows of feet. Two bundles of reproductive follicles on the mesentery.

Genus Mulleria.-Tentacles 20 to 25. Back convex, with the ambulacral papillæ standing more or less closely together. Ventral surface flat with very numerous feet, which are sometimes arranged in rows. Anus with five calcareous teeth.

Genus Labidodemas.-Tentacles 20. Feet arranged in five double longitudinal rows.

Genus Aspidochir.-Tentacles 12. Feet in five rows, but absent in front. Respiratory tree divided into five.

Genus Holothuria.-Tentacles 20. Feet generally not in Anus round or radiate, without calcareous teeth.

rows.

NEW ZEALAND MICRO-LEPIDOPTERA.

(ABSTRACT.)

The following species of Micro-lepidoptera from New Zealand are described by Mr. E. Meyrick in the Proceedings of the Linnean Society of New South Wales, vols. 5 and 6

ΤΙΝΕΙΝΑ.

GENUS GRACILARIA, Z.

Head smooth; no ocelli; tongue long. or longer than fore-wings, slender, filiform.

Antennæ as long
Maxillary palpi

rather long, filiform. Labial palpi moderately long, ascending, arched, slender, cylindrical; second joint smooth, sometimes loosely scaled beneath, terminal joint nearly as long as second. Fore-wings elongate, very narrow, parallel-sided, costa bent at apex or evenly pointed. Hind-wings very narrowly lanceolate, much narrower than fore-wings, cilia thrice or four times as broad. Abdomen elongate, slender. Legs long, slender; middle tibiæ often much thickened with scales. Fore-wings with 12 or II veins, 5 branches to costa, no secondary cell, I simple. Hind-wings with from 8 to 6 veins, 3 and 5 sometimes being obsolete; 5 and 6 stalked, cell open.

All the species are elegant, and some of great beauty; when at rest they sit with the forepart much raised, and the two anterior pairs of legs, which are often elegantly marked, conspicuously displayed. They are somewhat retired in habit, and may often be easiest found at rest on fences.

The larvæ are fourteen-legged, slender, always mining in leaves when young; afterwards many of the European and American species construct hollow cones for habitations, by rolling up pieces of the leaves they feed on; others remain miners all their life. All the Australian species, with the larvæ of which I am acquainted, are miners throughout life; nor have I ever seen indications of the familiar cones of this genus in Australia. The mining larvæ usually leave the mine in order to form their cocoon.

1. G. adelina, Meyrick (l.c., vol. 5, p. 142).—Head and thorax ochreous, reddish with violet reflections, face snow-white. Maxillary palpi whitish, externally ochreous, reddish. Labial palpi reddish-ochreous, white at base, lower half of terminal joint externally purple-fuscous. Antennæ longer than forewings, pale reddish-ochreous, annulated with dark fuscous. Abdomen fuscous-grey, pale ochreous at base, beneath metallicyellow. Legs pale ochreous; anterior tibiæ blackish; middle tibiæ very much thickened, deep reddish suffused with violet black. Fore-wings deep reddish-ochreous with violet reflections, with a very broad, pale metallic-yellow costal band, covering more than half the breadth of wing, and extending almost from base to apex; the ground colour sends a conical projection into this band before middle, cutting half through it, and midway between this and base is a much shorter, obtuse projection, both suffused with deep cobalt-blue; the lower 2/3 of the reddishochreous inner-marginal portion is marked from base to apex. with regular transverse strigulæ of brilliant deep cobalt-blue, appearing black in some lights; cilia reddish-ochreous round. apex, thence dark fuscous-grey. Hind wings and cilia dark. fuscous-grey. Male and female, length 6 lines.

This magnificent species is unsurpassed in the elegance and intensity of its colouring. I took one pair in dense swampy forest in January, near Hamilton, on the Waikato. It seems to be nearly allied to the North American G. violacella, Clem., and G. blandella, Clem.

2. G. æthalota, Meyrick (l.c., vol. 5, p. 143).—Head glossy dark grey, face paler. Labial palpi whitish, apex of second joint and a subapical ring of terminal joint black. Antennæ longer than fore-wings, grey-whitish, with evanescent fuscous annulations. Thorax and abdomen dark-fuscous grey. Legs whitish, tarsal joints suffused with pale fuscous, except an apical ring, anterior and middle tibiæ not thickened, suffused with fuscous above. Fore-wings unicolorous, dark, glossy, slaty-grey, with one or two pale scales at apex; cilia dark fuscous, with three obscure blackish lines round apex, and a whitish hook. Hind-wings and cilia dark fuscous-grey. Male, length 44 lines.

One specimen beaten from forest near Dunedin, in January. 3. G. ethela Meyrick (l.c., vol. 5, p. 152).—Head yellow on crown, crimson behind, face snow-white with a pale crimson-pink spot on each side. Maxillary palpi white, lower 3 externally pale crimson. Labial palpi white, second joint externally crimson, beneath fringed with a few loose hairs. Antennæ much longer than fore-wings, pale greyish-ochreous, basal joint yellow. Thorax yellow, anterior margin broadly crimson, and with a small crimson spot behind. Abdomen pale greyish-ochreous. Legs yellowish-white, tarsi with very slender blackish rings at apex of joints, anterior and middle tibiæ slightly thickened, crimson-fuscous at apex, and with two slender dark fuscous rings. Fore-wings pale yellow, deeper along inner margin, with a bright crimson irregular-edged undulating central streak from base to apex, connected with inner margin by four perpendicular half-fascia, one close to base, the others at 4, 2, and 34, and expanding abruptly at apex into a large apical spot; at the base this streak reaches costa, and at % from base is again connected with it by a perpendicular spot; beyond this on costa are two small crimson strigulæ ; central streak in parts margined above with black; parallel to its upper edge, and immediately above it, is a waved, black, longitudinal line, extending from midway between third and fourth inner-marginal spot to midway between fourth and apical spot; apical spot pure crimson, containing a circular black spot above centre, above which the colour becomes brownish-ochreous and is margined on costa with black; lower half of apical spot filled up with a sharp wedge-shaped snowwhite spot, the base of which is yellow, and separated from the rest by a crimson line; cilia yellow round apex, containing a blackish hook, crimson below apical spot, thence pale crimsongrey. Hind-wings dull pale purple-crimson, costal cilia grey, rest suffused with pale crimson. Male and female, length 52-534 lines.

Var. A.-All the crimson markings replaced by dull fuscous. I took seven very perfect specimens (six typical, one of the variety) amidst dense growth in the swampy virgin forest near Hamilton, on the Waikato, in January, mostly under tree-ferns.

4. G. aëllomacha, Meyrick (1.c., vol. 5, p. 158).—Head and palpi snow-white, labial palpi with apex of second joint and a subapical ring of terminal joint black. Antennæ longer than

fore-wings, white. Thorax snow-white, with a small black shoulder spot. Abdomen dark fuscous, beneath with white rings and white towards apex. Legs white, tarsi with three black rings, anterior tibiæ black, middle tibiæ hardly thickened, apical half black. Fore-wings white, with coarsely scaled fuscous-black markings; a cloudy, central, longitudinal streak from near base to disc above anal angle, connecting obscurely with seven oblique costal and five oblique dorsal streaks; costa blackish at base; first and second costal streaks thick, hardly oblique, meeting first and second dorsal streaks; third slender, very short, not reaching central streak; fourth strong, from middle of costa; fifth slender, short; sixth thick, black, very oblique, uniting with the small fifth dorsal on anal angle; fourth dorsal, thick before middle; seventh costal slender, produced nearly to hind-margin; apical spot black, large, round, cloudy; cilia white round apex, dark fuscous at anal angle, with two black lines and a short black apical hook, thence fuscous-grey. Hindwings fuscous-grey, cilia paler. Male, length 31⁄2 lines.

One specimen from forest growth at Wellington, in January. (To be continued.)

NEW ZEALAND COPEPODA OF THE "CHALLENGER" EXPEDITION.

Extracted from G. S. Brady's Monograph of this group.

FAMILY I-CYPRIDE.

Genus Paracypris (G. O. Sars).

Shell smooth, compact, elongated. Anterior antennæ 7jointed, beset with rather short setæ; posterior stout, terminating in 4 strong curved claws; ante-penultimate joint bearing at its base a pedicellated hyaline vesicle. Mandibles terminating in 5 or 6 long teeth, and bearing a 4-jointed palp, from the basal joint of which springs a narrow branchial appendage. External lobe or palp of the first pair of maxillæ linear, not much broader than the rest. Second pair of maxillæ provided with a branchial appendage, the palp elongated, conical, and inarticulate. Last pair of feet similar to the first in form and size; both pairs 5jointed, and terminating in a long curved claw, the last pair armed also with a short seta, which is directed upwards. Postabdominal rami large, armed at the extremity with 2 strong curved claws, and a short slender seta; the posterior margin also bears 2 long setæ ; one eye.

« AnteriorContinuar »